@font-face{font-family:Figtree Variable;font-style:normal;font-display:swap;font-weight:300 900;src:url(/_astro/figtree-latin-ext-wght-normal.DCwSJGxG.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Figtree Variable;font-style:normal;font-display:swap;font-weight:300 900;src:url(/_astro/figtree-latin-wght-normal.D_ZTVpCC.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:"Source Serif 4 Variable";font-style:normal;font-display:swap;font-weight:200 900;src:url(/_astro/source-serif-4-cyrillic-ext-wght-normal.cHuGMAiY.woff2) format("woff2-variations");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:"Source Serif 4 Variable";font-style:normal;font-display:swap;font-weight:200 900;src:url(/_astro/source-serif-4-cyrillic-wght-normal.DwHjdM4S.woff2) format("woff2-variations");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:"Source Serif 4 Variable";font-style:normal;font-display:swap;font-weight:200 900;src:url(/_astro/source-serif-4-greek-wght-normal.ece1310W.woff2) format("woff2-variations");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:"Source Serif 4 Variable";font-style:normal;font-display:swap;font-weight:200 900;src:url(/_astro/source-serif-4-vietnamese-wght-normal.D-yuW59g.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:"Source Serif 4 Variable";font-style:normal;font-display:swap;font-weight:200 900;src:url(/_astro/source-serif-4-latin-ext-wght-normal.CxNHBx-q.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:"Source Serif 4 Variable";font-style:normal;font-display:swap;font-weight:200 900;src:url(/_astro/source-serif-4-latin-wght-normal.D9elroTD.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Archivo Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/archivo-vietnamese-wght-normal.XAtsl5Q_.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Archivo Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/archivo-latin-ext-wght-normal.C4zznr8T.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Archivo Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/archivo-latin-wght-normal.E0tuGl4L.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Public Sans Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/public-sans-vietnamese-wght-normal.CtlIRbEm.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Public Sans Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/public-sans-latin-ext-wght-normal.MQgHevqp.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Public Sans Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/public-sans-latin-wght-normal.DdeTHZLK.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(data:font/woff2;base64,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) format("woff2-variations");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/_astro/jetbrains-mono-cyrillic-wght-normal.D73BlboJ.woff2) format("woff2-variations");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/_astro/jetbrains-mono-greek-wght-normal.Bw9x6K1M.woff2) format("woff2-variations");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/_astro/jetbrains-mono-vietnamese-wght-normal.Bt-aOZkq.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/_astro/jetbrains-mono-latin-ext-wght-normal.DBQx-q_a.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/_astro/jetbrains-mono-latin-wght-normal.B9CIFXIH.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--bg: #ffffff;--surface: #f4f7fa;--ink: #13212f;--muted: #4f5f6f;--line: #dce3ea;--primary: #0b3a5b;--link: #0b5a8c;--accent: #b4541f;--accent-ink: #ffffff;--accent-hover: #933f13;--answer-bg: #eef5fa;--answer-line: #0b3a5b;--warn-bg: #fff4e5;--warn-line: #b4541f;--tint: #fcefe6;--ui: "Figtree Variable", "Figtree", system-ui, -apple-system, "Segoe UI", sans-serif;--read: "Source Serif 4 Variable", "Source Serif 4", Georgia, "Times New Roman", serif;--mono: "JetBrains Mono Variable", ui-monospace, Consolas, monospace;--h-weight: 760;--radius: 10px;--gutter: clamp(16px, 4vw, 32px);color-scheme:light}html[data-family=concrete]{--surface: #f3f3f0;--ink: #1c1f22;--muted: #565c62;--line: #dadad4;--primary: #24292e;--link: #1f557d;--accent: #f2b705;--accent-ink: #1c1f22;--accent-hover: #d9a300;--answer-bg: #fff8db;--answer-line: #e0a800;--warn-bg: #fff1e8;--warn-line: #c2410c;--tint: #f6f2e3;--ui: "Archivo Variable", "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;--read: "Public Sans Variable", "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;--h-weight: 800}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:88px}body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 var(--ui);text-rendering:optimizeLegibility}img,svg{max-width:100%;height:auto}a{color:var(--link);text-underline-offset:2px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--link);outline-offset:2px;border-radius:3px}.skip{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 14px;z-index:50}.skip:focus{left:8px;top:8px}.wrap{max-width:1180px;margin:0 auto;padding-inline:var(--gutter)}.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:#fffffff5;backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;gap:20px;min-height:68px}.brand{display:inline-flex;align-items:center;flex:none}.brand img{height:36px;width:auto;display:block}.nav{display:flex;gap:4px 18px;flex-wrap:wrap;margin-left:auto;font:600 15px/1.2 var(--ui)}.nav a{color:var(--ink);text-decoration:none;padding:6px 2px}.nav a:hover,.nav a[aria-current=page]{color:var(--link);text-decoration:underline}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:700 16px/1 var(--ui);padding:13px 20px;border-radius:8px;border:0;background:var(--accent);color:var(--accent-ink);text-decoration:none;cursor:pointer;min-height:46px}.btn:hover{background:var(--accent-hover);text-decoration:none}.btn-ghost{background:transparent;color:var(--primary);box-shadow:inset 0 0 0 2px var(--primary)}.btn-ghost:hover{background:var(--surface)}.header-cta{flex:none;padding:11px 16px;min-height:42px;font-size:15px}.menu-toggle{display:none}@media(max-width:980px){.site-header .wrap{flex-wrap:wrap;gap:8px 12px;padding-block:10px}.nav{order:3;width:100%;margin:0;overflow-x:auto;flex-wrap:nowrap;gap:16px;padding-bottom:4px;scrollbar-width:none}.nav a{white-space:nowrap}.header-cta{margin-left:auto}.brand img{height:30px}}.crumbs{font:500 14px/1.4 var(--ui);color:var(--muted);padding-top:22px}.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}.crumbs li+li:before{content:"/";margin-right:6px;color:var(--line)}.crumbs a{color:var(--muted)}.page-head{padding:10px 0 8px;max-width:820px}.page-head h1{font:var(--h-weight) clamp(30px,4.2vw,46px)/1.1 var(--ui);letter-spacing:-.02em;margin:6px 0 14px;text-wrap:balance;color:var(--ink)}.meta{display:flex;flex-wrap:wrap;gap:6px 16px;font:500 14px/1.4 var(--ui);color:var(--muted)}.meta .pill{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:3px 10px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start;padding-bottom:64px}@media(max-width:1060px){.layout{grid-template-columns:minmax(0,1fr);gap:28px}}.rail{position:sticky;top:92px;display:grid;gap:18px}@media(max-width:1060px){.rail{position:static}.toc{display:none}}.answer{background:var(--answer-bg);border-left:5px solid var(--answer-line);border-radius:0 var(--radius) var(--radius) 0;padding:18px 22px;margin:18px 0 22px;max-width:760px}.answer .label,.facts .label,.rail-card .label{font:700 12px/1 var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}.answer p{margin:0;font:500 19px/1.55 var(--read)}.facts{border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:0 0 28px;max-width:760px}.facts ul{margin:0;padding-left:20px;display:grid;gap:6px;font:400 16px/1.5 var(--ui)}.safety{display:flex;gap:14px;background:var(--warn-bg);border:2px solid var(--warn-line);border-radius:var(--radius);padding:16px 18px;margin:18px 0;max-width:760px;font:500 16px/1.5 var(--ui)}.safety strong{display:block;font-size:17px;margin-bottom:2px}.safety svg{flex:none;width:28px;height:28px;color:var(--warn-line)}.prose{max-width:70ch;font:400 18px/1.72 var(--read)}html[data-family=concrete] .prose{font-size:17.5px}.prose h2{font:var(--h-weight) 26px/1.25 var(--ui);letter-spacing:-.01em;margin:40px 0 12px;text-wrap:balance}.prose h3{font:700 20px/1.3 var(--ui);margin:28px 0 8px}.prose p,.prose ul,.prose ol{margin:0 0 16px}.prose li{margin:4px 0}.prose strong{font-weight:650}.prose blockquote{margin:18px 0;padding:4px 18px;border-left:4px solid var(--line);color:var(--muted)}.prose code{font:500 .88em var(--mono);background:var(--surface);padding:1px 5px;border-radius:4px}.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}.prose .table-wrap,.prose table{width:100%}.table-scroll{overflow-x:auto;margin:0 0 20px;border:1px solid var(--line);border-radius:var(--radius)}.prose table{display:block;overflow-x:auto;max-width:100%;border-collapse:collapse;font:400 15.5px/1.45 var(--ui);font-variant-numeric:tabular-nums}.prose th,.prose td{text-align:left;vertical-align:top;padding:10px 12px;border-bottom:1px solid var(--line)}.prose th{background:var(--surface);font-weight:700;font-size:14px}.prose tr:last-child td{border-bottom:0}sup.cite{font:600 .68em var(--ui);margin-left:1px}sup.cite a{text-decoration:none}.rail-card{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:#fff}.rail-card.cta{background:var(--primary);color:#fff;border:0}html[data-family=concrete] .rail-card.cta{background:var(--primary)}.rail-card.cta .label{color:#ffffffbf}.rail-card.cta h2{font:var(--h-weight) 21px/1.25 var(--ui);margin:0 0 8px;color:#fff}.rail-card.cta p{font:400 15px/1.5 var(--ui);margin:0 0 14px;color:#ffffffe0}.rail-card.cta .btn{width:100%}.rail-card.cta small{display:block;margin-top:10px;color:#ffffffb8;font:400 12.5px/1.4 var(--ui)}.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:6px;font:500 14.5px/1.35 var(--ui)}.toc a{color:var(--ink);text-decoration:none}.toc a:hover{color:var(--link);text-decoration:underline}.after{max-width:70ch;display:grid;gap:28px;margin-top:36px}.after h2{font:var(--h-weight) 22px/1.25 var(--ui);margin:0 0 10px}.sources ol{margin:0;padding-left:22px;display:grid;gap:8px;font:400 14.5px/1.5 var(--ui);color:var(--muted)}.sources li:target{background:var(--tint);border-radius:4px}.sources a{overflow-wrap:anywhere}.related ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:10px}.related a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink);font:600 15.5px/1.35 var(--ui)}.related a:hover{border-color:var(--link);color:var(--link)}.faq details{border-bottom:1px solid var(--line);padding:12px 0}.faq summary{cursor:pointer;font:650 17px/1.4 var(--ui)}.faq p{margin:8px 0 0;font:400 16.5px/1.6 var(--read)}.disclosure{font:400 13.5px/1.55 var(--ui);color:var(--muted);border-top:1px solid var(--line);padding-top:14px}.hero{background:linear-gradient(180deg,var(--surface),#fff);border-bottom:1px solid var(--line)}.hero .wrap{padding-block:clamp(36px,6vw,72px);display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:40px;align-items:center}@media(max-width:900px){.hero .wrap{grid-template-columns:1fr}}.hero h1{font:var(--h-weight) clamp(34px,5vw,56px)/1.05 var(--ui);letter-spacing:-.025em;margin:0 0 14px;text-wrap:balance}.hero p.lede{font:400 clamp(18px,2vw,21px)/1.55 var(--read);color:var(--muted);margin:0 0 22px;max-width:56ch}.hero .actions{display:flex;flex-wrap:wrap;gap:12px}.hero-panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 14px 40px -24px #10203059}.hero-panel h2{font:700 13px/1 var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}.hero-panel ol{margin:0;padding:0;list-style:none;display:grid;gap:10px}.hero-panel a{display:flex;justify-content:space-between;gap:12px;text-decoration:none;color:var(--ink);font:600 16.5px/1.35 var(--ui);padding:10px 0;border-bottom:1px solid var(--line)}.hero-panel li:last-child a{border-bottom:0}.hero-panel a:after{content:"→";color:var(--accent)}html[data-family=concrete] .hero-panel a:after{color:var(--primary)}.sections{padding-block:48px}.sections h2.kicker{font:700 13px/1 var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 16px}.grid-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:16px}.card{display:grid;gap:6px;padding:20px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);background:#fff}.card:hover{border-color:var(--link)}.card strong{font:var(--h-weight) 19px/1.25 var(--ui)}.card span{font:400 15px/1.5 var(--ui);color:var(--muted)}.states{display:flex;flex-wrap:wrap;gap:10px}.states a{padding:9px 16px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--ink);font:600 15px var(--ui);background:#fff}.site-footer{background:#0f1720;color:#c9d3dc;margin-top:24px}html[data-family=concrete] .site-footer{background:#1c1f22}.site-footer .wrap{padding-block:44px 28px;display:grid;gap:28px}.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:28px}@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}.site-footer h2{font:700 13px/1 var(--ui);letter-spacing:.08em;text-transform:uppercase;color:#fff;margin:0 0 12px}.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px;font:500 15px/1.4 var(--ui)}.site-footer a{color:#c9d3dc;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.site-footer .brand img{height:32px}.site-footer p{font:400 14px/1.6 var(--ui);margin:10px 0 0;max-width:46ch}.legal{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;font:400 13px/1.6 var(--ui);color:#93a1ae}.qform{display:grid;gap:14px}.qform .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:560px){.qform .row{grid-template-columns:1fr}}.qform label{display:grid;gap:6px;font:600 14.5px/1.3 var(--ui);color:var(--ink)}.qform input,.qform select,.qform textarea{font:400 16px/1.4 var(--ui);padding:12px 13px;border:1.5px solid #b9c4ce;border-radius:8px;background:#fff;color:var(--ink);width:100%;min-height:48px}html[data-family=concrete] .qform input,html[data-family=concrete] .qform select,html[data-family=concrete] .qform textarea{border-color:#b7b7ae}.qform input:focus,.qform select:focus,.qform textarea:focus{outline:3px solid color-mix(in srgb,var(--link) 35%,transparent);border-color:var(--link)}.qform .consent{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:start;font:400 13.5px/1.5 var(--ui);color:var(--muted)}.qform .consent input{min-height:0;width:20px;height:20px;margin-top:2px;accent-color:var(--primary)}.qform .hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}.qform .err{color:#b42318;font:600 14px/1.4 var(--ui);min-height:1em}.qform button[disabled]{opacity:.6;cursor:progress}.form-ok{padding:22px;border-radius:var(--radius);background:var(--answer-bg);border-left:5px solid var(--answer-line)}.form-ok h3{margin:0 0 6px;font:var(--h-weight) 22px/1.25 var(--ui)}.q-hero{background:var(--primary);color:#fff}.q-hero .wrap{padding-block:clamp(32px,5vw,64px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,480px);gap:44px;align-items:start}@media(max-width:960px){.q-hero .wrap{grid-template-columns:1fr}}.q-hero h1{font:var(--h-weight) clamp(32px,4.6vw,52px)/1.07 var(--ui);letter-spacing:-.02em;margin:6px 0 16px;text-wrap:balance}.q-hero p.lede{font:400 19px/1.55 var(--ui);color:#ffffffe0;margin:0 0 20px;max-width:52ch}.q-hero ul.ticks{list-style:none;padding:0;margin:0;display:grid;gap:10px;font:500 16.5px/1.45 var(--ui)}.q-hero ul.ticks li{display:grid;grid-template-columns:24px 1fr;gap:10px}.q-hero ul.ticks svg{width:22px;height:22px;color:var(--accent);margin-top:1px}html[data-family=water] .q-hero ul.ticks svg{color:#f6a35f}.q-card{background:#fff;color:var(--ink);border-radius:14px;padding:24px;box-shadow:0 24px 60px -28px #0000008c}.q-card h2{font:var(--h-weight) 22px/1.25 var(--ui);margin:0 0 4px}.q-card p.sub{margin:0 0 16px;color:var(--muted);font:400 15px/1.5 var(--ui)}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:18px;padding-block:44px}.steps div{border-top:3px solid var(--accent);padding-top:14px}.steps b{display:block;font:var(--h-weight) 19px/1.3 var(--ui);margin-bottom:6px}.steps p{margin:0;color:var(--muted);font:400 16px/1.55 var(--ui)}.tool{border:2px solid var(--primary);border-radius:14px;padding:22px;margin:8px 0 30px;max-width:760px;background:#fff}.tool h2{margin:0 0 6px;font:var(--h-weight) 22px/1.25 var(--ui)}.tool .row{display:grid;grid-template-columns:1fr 1.4fr auto;gap:10px;align-items:end}@media(max-width:640px){.tool .row{grid-template-columns:1fr}}.tool label{display:grid;gap:6px;font:600 14.5px var(--ui)}.tool input,.tool select{font:500 17px var(--mono);padding:11px 12px;border:1.5px solid #b9c4ce;border-radius:8px;min-height:48px;width:100%}.tool select{font-family:var(--ui)}.tool output{display:block;margin-top:16px;font:500 16px/1.55 var(--ui)}.tool output .big{display:block;font:var(--h-weight) 26px/1.2 var(--ui);color:var(--primary)}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{.site-header,.rail,.site-footer,.btn{display:none!important}.layout{display:block}}.qform .err:empty{display:none}